Studies on the regional feature of organic carbon in sediments off the Huanghe River Estuary waters

	Studies on the regional feature of organic carbon in sediments off the Huanghe River Estuary waters
	Yuan, HM; Liu, ZG ; Song, JM; Lu, XX ; Li, XG ; Li, N ; Zhan, TR
	2004
发表期刊	ACTA OCEANOLOGICA SINICA
ISSN	0253-505X
卷号	23 期号:1 页码:129-134
文章类型	Article
摘要	Organic carbon (OC) in definitely small area sediments(according to marine dimension)off the Huanghe River Estuary is investigated in order to evaluate the feature of regional difference of physical and chemical properties in marginal sea sediments. The distributions of OC in sediments with natural grain size and the relationship with the pH, Eh,Es and Fe3+/Fe2+ are discussed. In addition,OC decomposition rates in surfacial/subsurfacial sediments are estimated. OC concentrations range from 0.26% to 1.8%(wt)in the study area. Significant differences in OC content and in horizontal distribution as well as various trends in surfacial/subsurfacial sediments exhibit the feature of regional difference remarkably in marginal sea sediments. The complicated distribution of OC in surface sediments is due to the influence of bacterial activity and abundance, bioturbation of benthos and physical disturbance. The OC decomposition rate constant in surfacial/subsurfacial sediments ranges from 0.0097 to 0.076 a(-1) and the relatively high values may be mainly related to bacteria that are mainly responsible for OC mineralization;meio-and macrofauna affect OC degradation both directly, through feeding on it, and indirectly through bioturbation and at the same time coarse sediments are also disadvantageous to OC preservation. In almost all the middle and bottom sediments the contents of OC decrease with the increase of deposition depth, which indicates that mineralization of OC in the middle and bottom sediments has occurred via processes like SO42- reduction and Fe-oxide reduction.; Organic carbon (OC) in definitely small area sediments(according to marine dimension)off the Huanghe River Estuary is investigated in order to evaluate the feature of regional difference of physical and chemical properties in marginal sea sediments. The distributions of OC in sediments with natural grain size and the relationship with the pH, Eh,Es and Fe3+/Fe2+ are discussed. In addition,OC decomposition rates in surfacial/subsurfacial sediments are estimated. OC concentrations range from 0.26% to 1.8%(wt)in the study area. Significant differences in OC content and in horizontal distribution as well as various trends in surfacial/subsurfacial sediments exhibit the feature of regional difference remarkably in marginal sea sediments. The complicated distribution of OC in surface sediments is due to the influence of bacterial activity and abundance, bioturbation of benthos and physical disturbance. The OC decomposition rate constant in surfacial/subsurfacial sediments ranges from 0.0097 to 0.076 a(-1) and the relatively high values may be mainly related to bacteria that are mainly responsible for OC mineralization;meio-and macrofauna affect OC degradation both directly, through feeding on it, and indirectly through bioturbation and at the same time coarse sediments are also disadvantageous to OC preservation. In almost all the middle and bottom sediments the contents of OC decrease with the increase of deposition depth, which indicates that mineralization of OC in the middle and bottom sediments has occurred via processes like SO42- reduction and Fe-oxide reduction.
关键词	Regional Feature Organic Carbon Sediments Huanghe River Estuary
学科领域	Oceanography
收录类别	SCI
语种	英语
WOS记录号	WOS:000220678300014
引用统计	被引频次：4[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/2760
专题	海洋生态与环境科学重点实验室海洋地质与环境重点实验室
作者单位	1.Chinese Acad Sci, Inst Oceanol, MEES, Qingdao 266071, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China 3.Zhoushan Marine Ecoenvironm Monitoring Stn, Zhoushan 316004, Peoples R China
推荐引用方式 GB/T 7714	Yuan, HM,Liu, ZG,Song, JM,et al. Studies on the regional feature of organic carbon in sediments off the Huanghe River Estuary waters[J]. ACTA OCEANOLOGICA SINICA,2004,23(1):129-134.
APA	Yuan, HM.,Liu, ZG.,Song, JM.,Lu, XX.,Li, XG.,...&Zhan, TR.(2004).Studies on the regional feature of organic carbon in sediments off the Huanghe River Estuary waters.ACTA OCEANOLOGICA SINICA,23(1),129-134.
MLA	Yuan, HM,et al."Studies on the regional feature of organic carbon in sediments off the Huanghe River Estuary waters".ACTA OCEANOLOGICA SINICA 23.1(2004):129-134.

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